If you haven’t played 2007’s most immersive and atmospheric shooter, or you’re back for replay, this mod is for you. This is the world of S.T.A.L.K.E.R. like you’ve never seen before, with updated graphics and added functionality that don’t change the original story or gameplay. The game hasn’t been changed beyond recognition, but rather enhanced while preserving the core elements that made it the unique experience it is.

Just what kind of ******** are you spewing? There is no way to put Crysis (CryEngine)shader into Stalkers X-Ray rendering engine. But if you want sun shafts/"god rays" try out Stalker Max Shaders by Kingo 64.